Fatigue performance test of polymer matrix composites

Polymer matrix composite materials have the advantages of high specific strength, high specific stiffness, fatigue resistance, corrosion resistance, etc. They can achieve significant weight reduction benefits by replacing traditional metal materials. Therefore, they are increasingly widely used in aerospace, automobiles, ships, construction and other fields. With the widespread application of polymer matrix composites, their mechanical properties testing has also received increasing attention.
The fatigue performance test of polymer matrix composites can determine the fatigue properties of polymer matrix composites under constant amplitude and constant frequency cyclic loading conditions.
Zhongke Testing Reliability Experiment Center has reliability testing capabilities for various polymer matrix composite materials and provides professional fatigue performance testing services for polymer matrix composite materials.

The main types of polymer composite materials include: glass fiber reinforced resin matrix composite materials, natural fiber reinforced resin matrix composite materials, carbon fiber reinforced resin matrix composite materials, aramid fiber reinforced resin matrix composite materials, metal fiber reinforced resin matrix composite materials, special fiber reinforced polymer matrix composite materials, ceramic particle resin matrix composite materials, thermoplastic resin matrix composite materials, thermosetting resin matrix composite materials, polymer matrix nanocomposites, etc.

1. Bending fatigue:
Under different bending stress or strain levels, alternating stress or strain is applied to the sample with a constant stress or strain amplitude, stress ratio or strain ratio and frequency until the sample fails. The test results are analyzed and processed, and the stress life (S-N) or strain life (e-N) curve is drawn.
2. Tension-compression and compression-compression fatigue:
Under different stress or strain levels, perform a cyclic loading test on the sample with a constant stress or strain amplitude, stress ratio or strain ratio and frequency with a stress ratio less than 0 (tensile-compression) or a stress ratio greater than 1 (compression-compression), and continue until the sample fails. The test results are analyzed and processed, and the stress life (S-N) or strain life (ε-N) curve is drawn.
3. Adhesive tensile shear fatigue:
When measuring the S-N curve, according to the purpose of the test, at least 4 stress levels are selected, and at least 3 valid samples are used for each stress level. Generally, the level is characterized by the maximum stress in the fatigue test.
4. Pull-pull fatigue:
Under different tensile stress or strain levels, alternating stress or strain is applied to the sample with a constant stress or strain amplitude, stress ratio or strain ratio and frequency until the sample fails. The test results are analyzed and processed, and the stress life (S-N) or strain life (ε-N) curve is drawn.

GB/T 35465.5-2020 Test method for fatigue performance of polymer matrix composites Part 5: Bending fatigue
GB/T 35465.4-2020 Test methods for fatigue properties of polymer matrix composites Part 4: Tension-compression and compression-compression fatigue
GB/T 35465.6-2020 Test methods for fatigue properties of polymer matrix composites Part 6: Adhesive tensile shear fatigue
GB/T 35465.2-2017 Test methods for fatigue properties of polymer matrix composites Part 2: Statistical analysis of linear or linearized stress life (S-N) and strain life (ε-N) fatigue data
GB/T 35465.3-2017 Test methods for fatigue properties of polymer matrix composites Part 3: Tensile-tensile fatigue
GB/T 35465.1-2017 Test methods for fatigue properties of polymer matrix composites Part 1: General principles